Hammer



FIG. 1 is a front perspective view showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom side view thereof;

FIG. 4 is a left side view of FIG. 1 thereof;

FIG. 5 is right side view of FIG. 1 thereof;

FIG. 6 is a first end view of FIG. 1 thereof; and,

FIG. 7 is a second end view of FIG. 1 thereof.

The broken lines in the drawings depict unclaimed environmental subject matter and form no part of the claimed design. 

The ornamental design for a hammer, as shown and described. 